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Whereas the Parliament of India has set out to provide a practical regime of right to 
information for citizens to secure access to information under the control of public authorities, 
in order to promote transparency and accountability in the working of every public authority, 
and whereas the attached publication of the Bureau of Indian Standards is of particular interest 
to the public, particularly disadvantaged communities and those engaged in the pursuit of 
education and knowledge, the attached public safety standard is made available to promote the 
timely dissemination of this information in an accurate manner to the public. 




Mazdoor Kisan Shakti Sangathan 
"The Right to Information, The Right to Live'' 



IS 15683 (2006, Reaffirmed 2012) : Portable Fire 
Extinguishers--Perf ormance and Construction--Specif ication . 
ICS 13.220.10 




Jawaharlal Nehru 
'Step Out From the Old to the New" 



aj^&vi iJii^s:y%K^ isb^^ni^seg 



:<>5&i| mT'5K^5?::5:^>^i»l 



K^^^iXSVCd^ 



Satyanarayan Gangaram Pitroda 
Invent a New India Using Knowledge 



Bhartrhari — Nitisatakam 
''Knowledge is such a treasure which cannot be stolen" 




^'^^^r 



k 




IS 15683 : 2006 






REAFFiRMEC 

mi 



Indian Standard 

PORTABLE FIRE EXTINGUISHERS — PERFORMANCE 
AND CONSTRUCTION — SPECIFICATION 



ICS 13.220.10 



©BIS 2006 

BUREAU OF INDIAN STANDARDS 

MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG 

NEW DELHI 110002 

August 20Q6 Price Group 10 






Fire Fighting Sectional Committee, CED 22 



FOREWORD 



This hidian Standard was adopted by the Bureau of Indian Standards, after the draft fmahzed by the Fire Fighting 
Sectional Committee had been approved by the Civil Engineering Division Council. 

This standard has been prepared with a view to guide the industries for the manufacture and users in manufacturing and 
procuring various types of portable extinguishers, capable of giving satisfactory performance. The details with regard 
to maintenance are given in IS 2190 : 1992 'Code of practice for selection, installation and maintenance of first-aid fire 
Qxtinguishi^rs (under revisiony. 

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value observed 
or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with IS 2 : 1 960 'Rules for 
rounding off numerical values (revised)'. The number of significant places retained in the rounded off value should be 
the same as that of specified value in this standard. 



AMENDMENT NO. 3 FEBRUARY 2010 

TO 

IS 15683 : 2006 PORTABLE FIRE EXTINGUISHERS 

PERFORMANCE AND CONSTRUCTION — 

SPECIFICATION 

(Page 23, clause 10.1) — Delete the following last sentence: 
"The paint shall conform to IS 2932.' 

(CED 22) 



Reprography Unit, BIS, New Delhi, India 



AMENDMENT NO. 2 NOVEMBER 2009 

' ' TO 

IS 15683 : 2006 PORTABLE FIRE EXTINGUISHERS — 

PERFORMANCE AND CONSTRUCTION — 

SPECIFICATION 

{Page 6, clause 7.6.1, line 3) — Delete 'as defined in IS 6910' and add the 
following after first sentence: 

'Figure 7 is an example of typical test apparatus for external corrosion test.' 

{Page 10, Table 5) — Substitute the following for the existing table: 

Table 5 Amouiit of Extinguishing Medium Used to Obtain Minimum 
Class B Rating of Extinguishers 

{Clause2.A2) 





Extinguishing Medium Content (Charge) 


Minimum 
Class B Rating 


Powder 

kg 


Carbon Dioxide 
kg 


Clear Agent 

kg 


Foam or Water 
with Additives 


(1) 


(2) 


• (3) 


(4) 


(5) 


/<2 


/<2 


/<2 


5- 


8B 


2</<3 


2</<5 


2</<4 


9 


13 B 


3</<4 


/>5 


4</<6 


9 


21 B 





'age 17, clause 9.2.5) — Shift clause 9.2.5 as 9.1.1 under clause 9.1 on 
i 6 and renumber the subsequent clauses from 9.2,6 onwards. 

{Page 23, clause 10.1) — Add the following at the end: 

'A small band of distinguishing colour of 5 percent of surface area shall be 
painted for different type of extinguishers. 



SI No. 


Extinguishers 


Band Colour 


i 


Water 


Red 


2 


Powder 


Blue 


3 


Foam 


Yellow 


4 


Carbon Dioxide 


Black 


5 


Clean Agent 


Green 



Amend No. 2 to IS 15683 : 2006 

(Page 23, clause 10.2.1.1) — Add the following sentence at the end: 

The marks specified above shall be applied to the metal of the body by hard 
stamping or engraving.' 

(Page 27, clause 11.1) — Insert the follov^^ing figure at the end: 



PLASTIC CABIN 




GLASS 



PLASTIC TUB WITH 
SALT WATER 



TULLU PUMP 



Fig. 7 Test Apparatus of External Corrosion Test 



(CED 22) 



Reprography Unit, BIS, New Delhi, India 



AMENDMENT NO. 1 DECEMBER 2008 

TO 

IS 15683 : 2006 PORTABLE FIRE EXTINGUISHERS ~ 

PEREORMANCE AND CONSTRUCTION - 

SPECIFICATION 

(Foreword) — Add the following after the second para: 

'The following standards shall be withdrawn with the implementation of this 
standard : 

1) IS 940 : 2003 Specification for portable fire extinguishers, water type 
(gas cartridge) (fourth revision) 

2) IS 2171 : 1999 Specification for portable fire extinguishers, dry powder 
(cartridge type) (fourth revision) 

3) IS 6234 : 2003 Specification for portable fire extinguishers, water type 
(stored pressure) (second revision) 

4) IS 10204 : 2001 Specification for portable fire extinguisher, mechanical 
foam type 

5) IS 13849 : 1993 Specification for portable fire extinguisher, dry powder 
type (stored pressure) 

6) IS 15397 : 2003 Specification for portable fire extinguisher, mechanical 
foam type (stored pressure) 

Clause 3.1(a) of IS 2878 : 2004 'Specification for fire extinguisher, carbon 
dioxide type (portable and trolley mounted) (third revision)' shall also be 
deleted simultaneously with the implementation of this standard. 

(Page 1, clause X6, line 3) — SubstiUxte '55 ± 5C for %S ± 5C\ 

(Page 2, clause 4, Note 3) — Delete '(Halotron, NAF, PV, HFC 36)' . 

(Page 3, clause 6.1, line 3) - Substitute '3.5 MPa (35 bar)' for '3 MPa 
(30 bar)'. 

[Page 3, clause 7.3.1(c)] - Substitute the following for the existmg: 

1 



Amend No. 1 to IS 15683 : 2006 

'c) not retain more than 10 percent (for dry chemical powder type) and 5 
percent (for other extinguishers) of initial charge within the extinguisher, 
following complete discharge.' 

{Page 6, Table 3, SI No. 3, col 3) — Substitute '55 ± S' for '60 ±2'. 

{Page 7, Table 4) — Add the following Note at the end: 

'NOTE — The fire rating shall be declared by the manufacturer based on the test report of a 
recogn ized I aboratory. ' 

{Page 10, Table 5) — Add the following as Note 2 and renumber the 
existing note as Note 1 : 

'NOTE 2 — The fire rating shall be declared by the manufacturer.* 

{Page 12, clause 833, line 18) — Substitute 'at the decision of the 
operator' /or 'but not the back of the crib, at will'. 

{Page 12, clause 83.3, last sentence) — Delete 'to ensure a continuous 

jet'. 

[Page 13, Table 9, footnote marked ^^] — Delete. 

{Page 1 6, clause 9.1) — Delete last sentence. 

{Page 16, clause 9.2.1.8.1, line 2) — Substitute '55 ± 5C for '55 °C'. 

{Page 20, clause 9.9.1) — Substitute the following for the existing: 

Hose Assembly — Extinguishers having a mass of extinguishing medium 
greater than 3 kg, oi a volume of extinguishing medium greater than 3 1 shall be 
provided with a discharge hose. 

The length of the flexible section of the hose assembly shall be 400 mm or 
greater.' 

{Page 25, clause 10.2.2.2, Warning): 

a) Delete ' Do not use —- per extinguisher. ' 

2 



Amend No, 1 to IS 15683 : 2006 

b) Delete the entire 'NOTE'. 

(Page 25, clause 10.2.3.1, last sentence) — Substitute the following for 
the existing: 

'A written description for each use code symbol may be included as part of the 
code, l^he description should be readable.' 



(CED 22) 



Reprography Unit, BIS, New Delhi, India 



18 15683:2006 



Indian Standard 

PORTABLE FIRE EXTINGUISHERS — PERFORMANCE 
AND CONSTRUCTION — SPECIFICATION 



1 SCOPE 

This standard lays down requirements for performance, 
reliability and safety of portable fire extinguishers of all 
types specified in this standard. 

2 REFERENCES 

The standards listed at Annex A contain provisions which 
through reference in this text, constitute provisions of this 
standard. At the time of publication, the editions indicated 
were valid. All standards are subject to revision and 
parties to agreements based on this standard are 
encouraged to investigate the possibility of applying the 
most recent editions of the standards indicated at 
Annex A. 

3 TERMINOLOGY 

For the purposes of this standard, definitions given in 
IS 7673 and the following definitions shall apply: 



3. 1 Classification of Fires 

follows: 



Fires may be classified as 



3.1.1 Class A — Fires involving solid combustible 
materials of organic nature such as wood, paper, rubber, 
plastics etc, where the cooling effect of water is essential. 

3.1.2 Class B — Fires involving flammable liquids or 
liquefiable solids or the like where a blanketing effect is 
essential. 

3.1.3 Class C — Fires involving flammable gases under 
pressure including liquefied gases, where it is necessary 
to inhibit the burning gas at fast rate with an inert gas, 
powder or vaporizing liquid for extinguishment. 

3.1.4 Class D — Fires involving combustible metals such 
as magnesium, aluminium, zinc, sodium, potassium, etc, 
when the burning metals are reactive to water containing 
agents and in certain cases carbon dioxide, halogenated 
hydrocarbons and ordinary dry powders. These fire require 
special media and techniques to extinguish. 

3.2 Portable Extinguisher — Portable fire extinguishers 
are not expected to deal with large fires. Nevertheless, 
these are very valuable in the early stages of fire. The 
most important features of these extinguishers are there 
immediately availability and can be used by one/two 



person(s). A fully charged portable fire extinguishers shall 
not be more than 17 kg. The extinguishing medium is 
discharged and directed into fire by storage pressure or 
release of pressurized charged storage in a cartridge. 

3.3 Extinguishing Medium ^ Substance contained in 
the extinguisher that causes fire extinguishment such as 
water, foam, powder, gaseous agent (CO^, halocarbon) etc. 

3.4 Charge of Extinguisher — Mass (kg) or volume 
(litres) of the extinguishing medium contained in the 
extinguisher expressed in volume for water based 
extinguishers and in kg for gaseous and powder 
extinguishers. 

3.5 Service Pressure (PJ — Equilibrium pressure 
developed in a normally charged and pressurized 
extinguisher conditioned at 27 ± S^'C for at least 1 8 h stored 
pressure or pressure generated during actuation of gas 
cartridge. 

3.6 Maximum Service Pressure (F J — Equilibrium 
pressure developed in a normally charged and pressurized 
extinguisher which is conditioned at 65 ± 5°C for at least 
18 h. 

3.7 Complete Discharge of Extinguishing Medium 
in Percentage and Time — Point in the discharge of an 
extinguisher when the internal pressure has equalized with 
the external pressure, with the valve control being kept 
fully open that is the point at which pressure on dial 
becomes zero. 

3.8 Effective Discharge Time — Time measured from 
the commencement of discharge of the extinguishing 
medium at the nozzle to the point of the discharge stream 
with the control valve fully open when 85 percent of 
extinguishant is discharged in case powder and 95 percent 
in case of water and gas based extinguishers. 

3.9 Rechargeable Extinguisher ^Extinguisher 
designed to be recharged after use. 

3.10 Disposable Extinguisher (Non-rechargeable 
Extinguisher) — Extinguisher designed not to be 
recharged, but intended to be discarded after use. 

3.11 Fill Density — ^ Mass in kg of extinguishing medium 



18 15683:2006 



per litre of container volume for use, complete with valve 
and internal fittings. 

3J2 Propellant — Non-flammable compressed gas used 
to expel the extinguishing medium that is CO^ and N^ etc. 

3.13 Clean Agent — Electrically non-conductive 
gaseous or vaporizing liquid fire extinguishant that does 
not leave a residue upon evaporation and are not toxic to 
level of concentration at which it extinguishes the fire. 

3.14 Lowest Observed Adverse Effect Level (LOAEL) 

— The lowest concentration of clean agent at which an 
adverse toxicological or physiological effect has been 
observed. 

3.15 No Observed Adverse Effect Level (NOAEL) — 

The highest concentration of a clean agent at which no 
adverse toxicological or physiological effect has been 
observed. 

4 CLASSIFICATION OF EXTINGUISHERS 

Extinguishers shall be classified by the type of 
extinguishing medium which they contain. At present, the 
main types of extinguishers are: 

a) water or/and foam based, 

b) powder, 

c) carbon dioxide, and 

d) clean agents, 

NOTES 

1 These types of extinguishers may be further sub-divided, for 
example water-based extinguishers may contain pure water or water 
with additives such as wetting agents, viscosity-increasing agents, 
flame-retardant, or foaming agents, etc. 

2 Powders may be of the 'BC or *ABC' types, or may be specially 
prepared for Class D (metals) fires. 

3 Clean agents which are halon substitutes that is HFC, HCFC 
blends etc (Halotron, NAP PV, HFC-36), Fluoro ketone. The 
manufacture and use of halocarbon including halons are regulated 
by the Montreal Protocol and/or by national regulations. 

5 EXTINGUISHING MEDIA, PROPELLANTS 
AND FILLING REQUIREMENTS 

5.1 Extinguishing Media 

5.1.1 Carbon Dioxide 

Carbon dioxide used in extinguishers shall comply with 
iS 15222. 

5.1.2 Clean Agents 

Clean agents used in extinguishers shall comply with the 
IS 15493 or standard of clean agent supplied by 
manufacturer. (To be confirmed for test methods,) 



5.1.3 Powders 

Powder for Class BC should comply with IS 4308, for 
Class ABC IS 14609 and powders for use on Class D fires 
shall comply with IS 4861. 

5.1.4 Foam Concentrates 

Foam concentrates used in extinguishers shall comply with 
IS 4989 or ISO 7203. 

NOTE — There is no Indian Standard covering non-foaming 
additives sometimes added to water to produce anti-freeze, wetting 
or other special characteristics. However, such extinguishers are 
included in the category of water-base extinguishers, the water- 
anti-freeze solution be tested for its freezing point and thawing. 
Calcium chloride solution shall not be used for stainless steel fire 
extinguishers. 

5.2 Propellants 

The propellants for stored pressure and cartridge-operated 
extinguishers shall be air, carbon dioxide, nitrogen or 
mixtures of these gases having a maximum dew-point 
of-55^C. 

NOTE — Propellant for stored-pressure water-based extinguishers 
need not meet the above dew-point requirement. 

5.3 Filling Requirements (Type Test) 

5.3.1 Fill Density 

The maximum fill density for carbon dioxide extinguishers 
shall not exceed 0.75 kg/1. The fill density for clean agent 
fire extinguishers shall not exceed the values given in the 
relevant standards. 

5.3.2 Filling Tolerance 

The actual charge of an extinguisher shall be the nominal 
charge within the following limits: 

a) water-foam based extinguisher : ^^ percent by 
volume; 

b) powder extinguishers 

< I kg nominal charge ± 5 percent by mass; 

> 1 kg but < 3 kg nominal charge ± 3 percent by 
mass; 

> 3 kg nominal charge ± 2 percent by mass; 

c) clean-agent extinguishers 
I percent by mass; and 

d) carbon dioxide extinguishers 
3 percent by mass. 

5.3.3 Capacities 

The following are the recommended capacities for fire 
extinguishers: 

a) water-foam based (litres) : 2, 3, 6, 9; 

b) powder (kg): 1,2,3,4,6,9; 



IS 15683 : 2006 



c) CO^Ckg): 2, 3, 4.5 and 5; and 

d) clean agent (kg): 1,2,4,6. 

6 PRESSURE REQUIREMENTS FOR LOW 
PRESSURE EXTINGUISHERS 

6.1 Test Pressure (P^) 

The test pressure (P ) for low-pressure extinguishers shall 
be 1 .43 X P^^ but in no case less than 2 MPa (20 bar). 

For gaseous extinguisher, it should not be less than 3 MPa 
(30 bar). 

6.2 Minimum Burst Pressure (PJ 

The minimum burst pressure (P^) for low-pressure 
extinguishers is 2.7 x p^^ but in no case less than 5.5 MPa 
(55 bar), 

7 GENERAL OPERATING PERFORMANCE 

REQUIREMENTS 

7.1 Operating Temperatures 

Extinguishers shall be capable of operating reliably within 
one of the following temperature ranges of temperature: 

+ 5 °C to + 55 ^C 

0^Cto + 55X 

- 10°Cto + 55°C 

-20°Cto + 55^C 

-30^Cto + 55X 

NOTE — The temperature range selected from the above shall be 
marked on the fire extinguisher (see 10.2.1.5). 

7.2 Minimum Effective Discharge Time and Bulk 
Range of Discharge 

1.2.1 Class A Rated Extinguishers 

The minimum effective discharge time of extinguishers 
with lA rating shall be no less than 8 s. Extinguishers 
with ratings of 2A or higher shall have a minimum 
discharge time of 13 s. 

7.2.2 Class B Rated Extinguishers 

The minimum effective discharge time of extinguishers 
with a Class B rating shall be no less than the value given 
in Table 1 , 

7.2.3 Bulk Range/Throw (Type Test) 

7.2.3.1 Requirements 

The minimum bulk range of extinguishers with a Class A 
rating shall be no less than 2 m when determined in 
accordance with 7.2.3.2. 



Table 1 Minimum Effective Discharge Time of 
Class B Rated Extinguishers 

(Clause 7.2.2) 



Classification 


Mi 


inimum Discharge 


Throw 






Time 


m 






s 




(1) 




(2) 


(3) 


8B 




8 


I 


13B 




8 


1 


21B 




8 


2 


34B 




8 


2 



7.2.3.2 Test method 

Carry out the test indoors having suitable lighting to give 
the best possible visibility of the extinguisher media during 
discharge. Use a black background marked to indicate the 
horizontal distance. Condition the extinguisher for no less 
than 1 8 h at a temperature of 27± 5°C and place it in normal 
operating position with the discharge nozzle held 
horizontally 1 m above the floor. Fully discharge the 
extinguisher with the control valve fully open within 
5 min of conditioning. Record the bulk range (through) of 
the extinguisher as the range at the time corresponding to 
50 percent of the effective discharge time that is if 
discharge time is 15 s. The range should be minimum up 
to 7.5 s. 

NOTE — Where the range of effective discharge is difficult to 
determine visually, supplennentary means, such as collection hoxes 
for powders and condensing plates for liquefied gases may also 
be used. 

7.3 Resistance to Temperature Changes (Type Test) 

7.3.1 Requirements 

Portable extinguishers shall be able to operate at 
temperatures within one of the temperature ranges given 
in 7.1 as indicated by the manufacturer and comply with 
the following requirements after being subjected to the 
conditions given in 7.3.2: 

a) shall operate as intended; 

b) commence discharge within 5 s of the opening of 
control valve; and 

c) not retain more than 10 percent of initial charge 
within the extinguisher following complete 
discharge. 

7.3.2 Test Method 

Subject four (two) extinguishers to the temperature cycles 
given in Table 2, two extinguishers to each cycle. 

Operate the extinguisher within 5 min of its removal from 
the conditioning chamber. 



18 15683:2006 



Table 2 Temperature Cycles 

{Clause 13 2) 



Duration 

h 

(0 



Cycle 1 

(2) 



Cycle 2 

(3) 



24 ± \ 
24 ± ] 
24 ± 1 



Store at minimum'^ stated temperature ( ^ °C) 
Store at (27 ± 5fC 
Store at (55 ± SfC 



Storeat(55±5rC 
Store at (27 ± 5)^0 
Store at min'* stated temperature ( " X) 

'^ See lA temprature range marked on the extinguisher. 

The storage temperatures refer to the ambient temperature within the conditioning chamber. A Hquid bath shall not be used. 



The extinguisher is to be held in its normal working 
position and shall remain immobile for the duration of the 
test. 

NOTE — For cartridge operated extinguishers the cartridge shall 
be pierced and the pressure allowed to build for 6 s before opening 
the control valve. 

7,4 Retention of Charge 

7.4.1 Routine Checks 

7.4.1.1 Extinguishers and gas cartridges shall be designed 
so as to permit their charge to be checked at regular 
intervals when they are installed as per IS 2190. 

7.4.1.2 The charge of the following shall be measured by 
weighing: 

a) All types of gas cartridges for extinguishers; 

b) Carbon dioxide extinguishers; and 

c) Stored-pressure extinguishers of various types 
including some clean agents in which a mass loss 
of 1 percent of total mass is accompanied by a 
pressure loss of not more than 1 percent of the 
service pressure at 27 ± 5°C. 

7.4.1.3 The charge of stored-pressure extinguishers of 
types not covered in 7.4.1.2 (b) and (c) shall be checked 
by direct measurement of internal pressure at 27 ± 5°C. 
For this purpose, the extinguisher shall be fitted with a 
built-in pressure-indicating device, which can be checked 
for satisfactory operation. 

A connection to which an independent pressure-measuring 
appliance can be attached may be used as the means for 
checking the built-in pressure-indicating device; in this 
case, a connection of this type shall be equipped with a 
pressure-retaining cap. 

7.4.2 Retention of Charge Following Partial Discharge 

1A,2A Requirements 

Fire extinguishers shall be fitted with a control valve 



allowing the discharge of the extinguishing medium to be 
interrupted at any time. 

The extinguisher shall be adequately resistant to leakage 
and the second pressure (or weight of contents as 
appropriate) shall be no less than 75 percent of the first, 
after interruption of the discharge as determined in 7.4.2.2. 

7.4.2.2 Test method 

Discharge a fully charged extinguisher for a period equal 
to half the time for total discharge and the control valve 
shall then be closed. Measure the internal pressure (or 
weight of contents as appropriate) and after a further 
5 min with the valve having remained closed, measure the 
pressure (or weight of contents as appropriate) again. 

7.4.3 Long-Term Leakage Test (Type Test) 

7 A3. 1 Requirements for stored-pressure extinguishers 

Stored-pressure extinguishers covered in 7.4,1.3 shall not 
leak at a rate exceeding 5 percent per annum of service 
pressure. 

7.4.3.2 Requirements for gas cartridges and extinguishers 
checked by mass 

Long-term leakage requirements are as follows: 

a) Stored-pressure extinguishers without a pressure 
gauge shall not leak at a rate exceeding 5 percent 
of its contents per annum or 50 g per annum, 
whichever is less [see 7.4.1.2 (c)]; 

b) Gas cartridges shall not leak at a rate exceeding 
5 percent of its contents per annum or 7 g per 
annum, whichever is less; and 

c) Carbon dioxide extinguishers shal 1 not leak at a rate 
exceeding 5 percent of its .contents per annum. 

7.4.3.3 Test method 

Check six samples for leakage after 30, 90 and 120 days. 
Any loss in pressure or contents at constant ambient 
temperature is an indication of a leak. Measure the leakage 



IS 15683 : 2006 



in terms of weight or pressure loss, whichever is applicable. 
7.5 Mechanical Resistance (Type Test) 

7.5.1 Resistance to Impact 

This test is intended to prove the resistance of the 
extinguisher, and particularly that of the head and fittings, 
to damage from falling objects or from impact with fixed 
surfaces. 

7.5.1.1 Requirements 

The extinguisher shall not release pressure in a potentially 
dangerous manner when tested in accordance with 7.5. 1.2. 

7.5.1.2 Test method 

Condition an extinguisher, correctly charged and equipped 
with all the fittings which are subject to internal pressure 
in normal operation, for 18 h to the minimum working 
temperature {see 7.1) with a tolerance of ± 5°C, and 
maintain it at this temperature during the impact test 
described below. 

If the extinguisher is of the gas cartridge type, fit the 
charged cartridge and activate the extinguisher with the 
control valve shut, so as to keep the extinguisher under 
pressure. 

Conduct the impact test as follows: 

Mount a steel cylindrical hammer, of 75 mm diameter and 
total mass of 4.0 kg with flat faces, vertically in loose 
guides so that it can drop freely through a height h 
(minimum height 300 mm) given by: 



h=- 



m 

20 



and h > 0.3 



where - 

h = height, expressed in m; and 
m= total mass of extinguisher, expressed in kg. 

The extinguisher shall be placed on a rigid flat surface, 
protecting pressure gauge, in each of the following two 
positions in turn: 

a) in the nonnal upright position, with the longitudinal 
axis of the hammer coincident with the longitudinal 
axis of the valve; and 

b) lying on its side so that the valve rests on a rigidly 
fixed steel block. 

In each of the above positions, submit the valve of the 
extinguisher to an impact by allowing the steel hammer to 
fall vertically onto it from the height k The point of impact 
is to be examined. 

1 32 Resistance to Vibrations (Type Test) 



7.5.2.1 Test principle 

An extinguisher shall be capable of withstanding exposure 
to the conditions of a vibration test without development 
of physical weakness, which would impair its normal 
operation. 

7.5.2.2 Extinguisher mounting requirements 

Extinguishers supplied with a wail hook or bracket not 
intended for use in vehicles shall be subjected to the test 
specified in 7.5.2.5.2. 

Extinguishers supplied with a bracket for use in vehicles 
shall be subjected to the test specified in 7.5,2.5.3. 

Extinguishers supplied with a bracket suitable for both 
general and vehicle use shall be subjected to the test 
specified in 7.5.2.5.3. 

7.5.2.3 Test criteria 

The test criteria are as follows: 

a) Following exposure to the vibration test the 
extinguisher shall comply with the discharge 
requirements specified in 7.2; and 

b) Physical failure of components which would require 
repair or replacement of the extinguisher and/or 
components before it can be returned to nonnal 
service shall be cause for rejection. 

7.5.2.4 Mounting of the test specimen 

Mount a fully charged extinguisher in an upright position. 
Mount extinguishers intended for use in vehicles in their 
intended bracket. Extinguishers not intended for use in 
vehicles may be tested without a bracket. 

7.5.2.5 Test orientation 

7.5.2.5.1 Axes of orientation 

Subject the extinguisher to the vibration test specified 
in 7.5.2.5.2 or 7.5.2.5.3 in each of the three rectilinear 
axes in the following order: horizontal, lateral, and vertical. 

7.5.2.5.2 General extinguishers 

The vibration applied shall have the following parameters: 
Frequency : 40 Hz 
Amplitude : 0.25 ± 0.03 mm 

Duration : 2 h (in each orientation specified in 
7.5.2,5.!) 

7.5.2.5.3 Vehicle extinguishers 

Subject the vehicle extinguishers to the following tests: 

a) Subject the extinguisher to the variable frequency 
and amplitude specified below in each orientation 
specified in 7.5,2,5.1. 



IS 15683 : 2006 



Frequency, Hz 
10 to 19 
20 to 39 
40 to 60 



Amplitude, mm 
0.75 ± 0.08 
0.50 ±0.05 
0,25 ± 0.03 



Table 3 Temperature Cycle 

{Clause 1.62) 



Vibrate the extinguisher for 5 min at each frequency 
and Increase the frequency at discrete intervals of 
2 Hz, and 

b) Vibrate the extinguisher for 2 h at the frequency 
which produced the maximum resonance as 
determined in (a) above or if no resonance is 
observed subjected to the test specified in 7.5.2.5.2. 

Complete the tests specified in (a) and (b) above in one 
plane before making tests in the next plane. 

7.6 Resistance to Corrosion (Type Test) 

IMA External Corrosion Test 

Subject complete and fully charged extinguishers, 
including their mounting bracket and wall hook, to a salt 
spray test as defined in IS 6910 for a period of 240 h. 
Following a drying period of at least 24 h at room 
temperature, carefully wash the extinguisher to remove 
any salt deposits. Test two samples that is either two of 
the same size or one sample each of two different sizes 
from the same family. 

At the conclusion of the test the following requirements 
shall be satisfied: 

a) The mechanical operation of all working parts shall 
be unimpaired; 

b) The minimum effective discharge time and method 
of operation shall comply with requirements 
specified; 

c) The pressure gauge, if one is fitted, shall remain 
functional and watertight; and 

d) There shall be no corrosion of the metal of the 
extinguisher body; discolouration/superficial 
corrosion of non-ferrous metals is acceptable, but 
galvanic corrosion between dissimilar metals shall 
not be permitted. 

7.6.2 Internal Corrosion Test for Extinguishers Using 
Water-Based Media (Type Test) and Gaseous 
Extinguishers 

Subject two extinguishers, charged in accordance with the 
manufacturer's filling instructions, eight times to the 
temperature cycle defined in Table 3. 

On completion of the eight temperature cycles, cut each 
body into two sections in a manner sufficient to permit 
internal examination. Disregard detachment of any 



Stage 

(1) 


Duration 

h 

(2) 


Temperature, '^C 

(3) 


1 


27 ±5 


1) 


2 


>27 


27 ±5 


3 


27 ±5 


60 ±2 


4 


>27 


27 ±5 



The temperature refers to the ambient temperature of the conditioning 
chamber. A liquid bath shall not be used. The duration of any one 
complete cycle shall not exceed 120 h. 

' * The lowest temperature marked on the extinguisher ± 2X {see 7.1). 



protective coating local to the plane of section. There shall 
be no visible signs of corrosion of the metal nor 
detachment, cracking or bubbling of any protective 
coating. There shall be no visible change in the colour of 
the extinguishing media other than that resulting from the 
thermal cycling in case of water based media only. 

NOTE — Allowance should be made for a change of colour that 
occurs naturally due to the temperature changes. It is recommended 
that two samples of the agent be stored in closed glass containers 
and subjected to the same cycles as the extinguishers in order to 
establish a reference sample. 

7.7 Tapping Test (Type Test) 

7.7.1 Requirements 

Portable extinguishers shall comply with the following 
requirements after being subjected to the condifioning 
specified in 7.7.3 : 

a) Shall operate satisfactorily; 

b) Commence discharge within 5 s of the opening of 
the control valve; and 

c) Not retain more than the following percentage of 
initial charge within the exfinguisher following 
complete discharge: 

1 ) powder: 1 5 percent 

2) all other media: 10 percent. 

7.7.2 Test Apparatus 

7.7.2.1 Compaction machine, designed to accept only one 
extinguisher at a time which shall be raised by rod and 
guided by castors. 

The plate supporting the extinguisher shall be of steel 
300 ± 5 mm square and 60 ± 1 mm thick. Figure 1 is an 
example of an acceptable test apparatus. 



Observe the following points: 



IS 15683 : 2006 



a) Ensure that the rod is adjustable as to adjust to the 
extinguisher base; 

b) Ensure that the rod can move freely in the guide 
castors; and 

c) Extinguisher shall also be guided without constraint. 

7.7,3 Test Method 

An extinguisher in a normally charged condition shall be 
held in the vertical position and dropped vertical 500 times 
from a height of 1 5 mm at a frequency of I Hz onto a rigid 
horizontal steel plate. 

The extinguisher is to be removed from the test apparatus 
with a minimum amount of agitation, held in its normal 
working position, and operated. 

NOTE — For cartridge extinguishers, the cartridge shall be pierced 
and the pressure allowed to build for 6 s before opening of the 
control valve. 

7.8 Intermittent Discharge Test 

7.8.1 An extinguisher conditioned at its minimum 
operating temperature ± 2°C and at 55 ± 5 °C shall operate 
in such a manner that no more than I s elapses from the 
time the control valve is opened until the extinguishing 
media starts to discharge. Additionally, at the end of 
discharge, the extinguisher shall not retain more than the 
following percentages of its original charge: 

a) powder: 15 percent; and 

b) all others: 10 percent. 

7.8.2 Condition a correctly charged extinguisher at each 
of the specified temperatures for a min of 18 h. Operate 
the extinguisher intermittently by opening and closing the 
valve in cycles of 2 s 'open' and 2 s ^closed' until the end 
of discharge is reached. 

7.8.3 For cartridge-operated extinguishers, pierce the 
cartridge and allow the pressure to build for 6 s before 



opening the control valve. 

8 PERFORMANCE REQUIREMENTS FOR 
TEST FIRES 

8.1 Rating Suitability for the Various Classes of Fire 

8.1.1 Class A 

The rating of extinguishers recommended as suitable for 
Class A fires shall be determined using the method 
described in 8.3. The rating shall be based on the amount 
of extinguishing medium used to extinguish the fire of 
maximum size under the conditions of the test. This amount 
shall be no less than the appropriate minimum value given 
in Table 4. 

8.1.2 Class B 

The rating of extinguishers recommended as suitable for 
Class B fires shall be determined using the method give 
in 8.4. The rating shall be based on the amount of 
extinguishing medium used to extinguish the fire of 
maximum size under the conditions of the test. This amount 
shall be no less than the appropriate minimum value given 
in Table 5. 

8.1.3 Class C 

There are no tests requirements for the performance of 
extinguishers against Class C fires included in this 
standard, suitability for use against Class C may be claimed 
for Class B or Class AB powder extinguishers only. 

8.1.4 Class D 

Extinguishers recommended as suitable for Class D fires 
shall extinguish the appropriate test fire or fires when tested 
as described in 8.5. 

NOTE — Extinguishers suitable for Class D fires are usually not 
suitable for use on fires of other classes. Specialized media and 
applicators are typically used. 



Table 4 Amount of Extinguishing Medium Used to Obtain a Minimum Class A Rating of Extinguishers 

(Clause SA A) 





Extinguishing Medium Content (Charge) 




Minimum 
Class A Rating 


Powder 
kg 


Water/Foam 
Water with Additives 


Clean Agent 
kg 




(i) 


(2) 


(3) 


(4) 


/<2 


/<6 


/<6 


I A 


2</<4 


6</<IO 


6</<8 


2A 


4</<6 


/>10 


/>8 


3A 


6</<9 






4A 


/>9 






6 A 



18 15683:2006 










1A General Diagram 






Key 












1. 


Castor support axis 


8. 


Castor 


15. 


Adjusting block 


2. 


Castors 


9. 


Cam 


16. 


Support axes 


3. 


Cl + C, M12- 190 screw 


10. 


Inductive pick-up 


17. 


Plate support axis 


4. 


Push-nut extinguisher 


11. 


Rotation guidance 


18. 


Flender-Himmel geared motor 


5. 


H, M1 6-90 screw 


12. 


Axes 


19. 


System support plate 


6. 


Plates 


13. 


Castor nut 






7. 


Piston 


14, 


Support plate 







Fig. 1 Tapping Machine ~~ Continued 



18 15683:2006 




1 B View from Above 




+0.1 

28.3 



All dimensions in millimetres. 



1C Side View 
Fig. 1 Tapping Machine 



18 15683:2006 

Table 5 Amount of Extinguishing Medium Used to Obtain Minimum Class B Rating of Extinguishers 

(Clauses.] 2) 





Extinguishing Medium Content (Charge) 




Minimum 
Class B Rating 


Powder 
kg 


Carbon Dioxide 
kg 


Clean Agent 
kg 


Foam or Water 

with Additives 

1 




(1) 


(2) 


(3) 


(4) 


(5) 


!<2 


/<2 


/<2 


5 


8B 


l<2 


/<2 


/<2 


5 


I3B 


2</<3 


2</<5 


2</<4 


9 


2IB 


3</<4 


/>5 


4</<6 


9 


34B 


NOTE— At 


present the clean agent approved 


internationally for this purpose are HFC and HCFC. 





8.2 Test Fires — General 

8.2.1 Operator s Clothing 

To carry out these tests the operator shall wear suitable 
protective clothing including shoes, helmet, visor, gloves 
etc. 

MOTE —Attention is drawn to the necessity for taking precautions 
to safeguard the health and safety of personnel conducting the 
tests against the risk of fire and inhalation of smoke and any toxic 
products of combustion, and compliance with the national 
legislation which may apply concerning the health and safety of 
the extinguisher operator and other personnel. 

8.2.2 Requirements for Extinguishment 
Test fires shall be regarded as extinguished if: 

Class A — All flames are extinguished. There shall 
be no flames visible 10 min after complete discharge 
of the extinguisher. The appearance of non-persistent 
flames during the 1 min period shall be ignored. Non- 
persistent flames are defined as less than 50 mm in 
height and less than 1 min duration; if the Class A 
crib collapses during the test, it shall be considered 
void and a fresh test carried out. 

Class B — All flames are extinguished. 

8.2.3 Test Extinguishers and Method of Use 

Use extinguishers filled and charged according to the 
manufacturer's instructions. It is permitted, at the 
operator's discretion, to operate a gas cartridge 
extinguisher so as to allow the operating pressure to 
increase in the body prior to discharge. 

8.2.4 Test Schedule (Type) 

The basic schedule of testing is a set of three fires. Class 
A or Class B rating is achieved by extinguishing two out 
of three fires of the same size. Class D suitability for a 



particular metal or form of metal is established by 
extinguishing either the first fire of the set, or if this is not 
extinguished, extinguishing the second and third test fires. 

A set comprises fires consecutively carried out and the 
result of any particular test fire is not to be disregarded. 
Each set is to be completed before another is started. For 
Class A and Class B fires, a set is completed either when 
all three test fires are carried out or when the first two test 
fires are both successful or both unsuccessful. For Class 
D fires, a set is complete when the first test is successful, 
or when the first and second fires are both unsuccessful, 
or when all three are carried out. 

8.3 Class A Test Fire 

8.3.1 Location 

Conduct the tests in an essentially draught-free room 
having adequate volume and ventilation to ensure the 
necessary supply of oxygen and reasonable visibility for 
the period of the test. 

Air inlet openings at or near ground level as given in 
Table 6, with a flue area of 4.5 m^ have been found to 
provide adequate ventilafion. 

NOTES 

1 For example, it has been established that a room having a ceiling 
height of approximately 3 m and size 7 m x 7 m for class upto 2A 
and 34 B and of size 1 5 m x 1 5 m for higher classes with adjustable 
inlet openings near the four corners is suitable for these purposes. 
The room should have smoothly finished concrete floor. 

2 This test may be carried out by putting 3 m high mild steel 
sheet enclosing three sides till infrastructure is developed for indoor 
test facilities. 

8.3.2 Construction 

The test fire consists of a crib made of pieces of wood. 
The pieces of wood forming the outside edges of the crib 
may be stapled or nailed together to provide strength. 



10 



IS 15683 : 2006 



Table 6 Example of Typical Air Inlet Sizes for 

Ventilation of Class A Test Fires 

(Clause %3 A) 



Classification 


Air Inlet Opening 


and Rating 


Surface Area 




m^ 


(1) 


(2) 


lA 


0.!0 


2A 


0.10 


3A 


0.15 


4A 


0.20 


6A 


0.30 



Construct the crib on two 63 mm x 38 mm angle irons or 
other similar and appropriate supports, placed on concrete 
blocks or support frame so as the height of the supports 
above the floor is 400 ± 10 mm. 

Stack the pieces of wood in the appropriate arrangement 



specified in Table 7. Stack each layer of the pieces of wood 
at right angles to the layer below. Stack individual pieces 
of wood on each layer with even spacing and in the form 
of a square with sides equal to the length of the piece of 
wood (see Fig. 2). 

Use pieces of wood of Pinus Sylvestris, or of other wood 
which can be shown to be equivalent, of appropriate length 
as specified in Table 7 and of square cross-section with 
sides of 39 ± 1 mm, a moisture content of 10 percent to 
1 4 percent by mass (dry basis). 

NOTES 

1 Wood is considered to be equivalent if the rating achieved using 
wood that is not more than that achieved when Pinus Sylvestris is 
used. Cryptomeria Japonica may be preferred in India. 

2 Determine the moisture content of the pieces of wood using 
commercially available instruments which measure electrical 
conductivity between needle probes pushed into the sticks or other 
suitable method. Some variation in reading may be obtained due to 
structural variation of the timber and the direction of the grain. 
Calibrate the instrument by determination of moisture content in 
accordance with IS 1 708 (Part 1 ). 



majELajajE 



XI M M M M-1>Z 



>^ M M M b^r^ 



yi M M M b^TlK 



— — _ — _ — ___^ — _ 

Al lAI lAI l/N LAI LA 



yi M M M KT^ 




SUPPORTING 
FRAME 

IGNITION PAN 



WEIGHING 
PLATFORM 



Fig. 2 Crib Fire 
11 



IS 15683 : 2006 



Table 7 Wood Crib Construction 

(Clause S3 2) 



Table 8 Wood-Crib Ignition Arrangement 

(Clause S33) 



Class A 
Rating 

(1) 


Number of 

Pieces of 

Wood 

(2) 


Length of 

Pieces of 

Wood 

mm 

(3) 


Arrangement of 
Pieces of Wood 

(4) 



lA 


72 


500 


2A 


112 


635 


3A 


144 


735 


4A 


180 


800 


6A 


230 


925 



12 layers of 6 pieces of wood 
16 layers of 7 pieces of wood 
1 8 layers of 8 pieces of wood 
20 layers of 9 pieces of wood 
23 layers of 10 pieces of wood 

NOTE — If necessary in the future, it is intended that this table be 
extended to include larger test fires. These will be constructed on 
the same principles as those now listed. Each Class A rating is 
designated by a number in a series which is proportional to the 
mass of wood contained in a craib. AH cribs are cubic with the volume 
of the open space approximately equal to the volume of the wood. 



8.3,3 Procedure 

Place an ignition pan of appropriate size as specified in 
Table 8 on the floor under the crib. Level the pan as far as 
is possible and add suificient water to cover the base. Pour 
the appropriate volume of fiael (as specified in Table 8) 
into the pan. Ignite the fuel. Remove the pan once the 
liquid has been consumed. 

Allow the crib to bum until its mass is reduced to 55 i 2 
percent of its original mass: The mass loss may be 
determined directly or by other methods which can be 
demonstrated to provide equivalent correlation. 

NOTE — This will take 6 min to 1 min. Either monitor the mass 
continuously or determine the time by a preliminary test or tests, 
extinguishing the fire(s) and measuring the mass and core 
diameters making adjustments as necessary. 

Apply the discharge of the extinguisher to the test fire, 
initially to the front. Reduce the distance of attack and 
apply the discharge to the top, bottom, front or either side 
but not the back of the crib, at will. Maintain all devices 
for controlling the flow of the extinguishing media in the 
position for maximum discharge to ensure a continuous 
jet. 

8.4 Class B Test Fire 

8.4.1 Location 

Carry out test fires up to and including 1 3B indoors. Carry 
out test fires larger than 1 3 B indoors or outdoors but with 
the wind speed not exceeding 3 m/s. Do not carry out tests 
outdoors when rain, snow or hail is falling. 

8.4.2 Construction 

Class B test fires utilize a range of welded-sheet-steel 
cylindrical trays (dimensions given in Table 9). The sides 



Class A Rating 



(1) 



Ignition Pan Size 

mm 

(2) 



Heptane Charge '' 

/ 

(3) 



lA 


400 X 400 X 100 


2A 


535 X 535 X 100 


3A 


635 X 635 X 100 


4A 


700 X 700 X 100 


6A 


825 x825 X 100 


See 8.4.3. 





l.I 

2.0 
2.8 
3.4 
4,8 



are vertical. The base of the trays are set horizontal and 
level with the surrounding ground. 

NOTE — Reinforcement of the base of the larger test fire trays 
will be necessary to minimize distortion. In such cases it will be 
necessary to ensure that the underside of the trays are not exposed 
to the atmosphere. 

Details of Class B test fires are given in Table 9. Each test 
fire is designated by a number followed by the letter B. 

8.4.3 Fuel 

Use an aliphatic hydrocarbon having an initial boiling point 
of not less than 88°C and a fmal boiling point of not more 
than 105X. 

NOTE — Typical fuels meeting this requirement are «-heptane 
and certain solvent fractions sometimes referred to as commercial 
heptane! 

8.4.4 Procedure 

8.4.4.1 Add the appropriate volume of water and heptane 
specified in Table 9. Add additional water to compensate 
for distoition of the base so that all points are covered, 
subject to a maximum liquid depth of 50 mm and a 
minimum heptane depth of 1 5 mm at any point. 

8.4.4.2 For the testing of foam and clean agent 
extinguishers use fresh fuel for each test, 

8.4.4.3 When testing powder extinguishers it shall be 
demonstrable that the rating can be achieved using fresh 
fuel. 

8.4.4.4 Ignite the fuel 

8.4.4.5 Permit the fuel to burn freely for a minimum of 
60 s before operating the extinguisher. 

8.4.4.6 Operate the extinguisher and apply the 
extinguishing medium to the test fire, 

NOTES 

1 The extinguisher may be discharged continuously or in 
intermittent bursts at the discretion of the operator. The operator 



12 



18 15683:2006 



Table 9 Dimensions of Class B Test Fires 

{Clause 8.4.2) 



Classification 


Minimum 
Discharge of 


Volume 
of 




Dimensions 


of Test Fire Tray 






^-■■^ . 






'^"-v,,^^ 




Extinguisher 


Liquid'* 


Diameter^^ 


Internal 


Minima! 


Approximate 




s 


I 


mm 


Depth'' 
mm 


Thickness 

ofWalls 

mm 


Surface Area 

of Fire 

m' 


(1) 


(2) 


(3) 


(4) 


(5) 


(6) 


(7) 


m'^ 


— 


8 


570 ± 10 


150±5 


2.0 


0.25 


13B^> 


-- 


13 


720 ± 10 


150 ±5 


2.0 


0.41 


21B 


8 


21 


920 ± 10 


150±5 


2.0 


0.66 


34B 


8 


34 


1 170 ± 10 


150±5 


2.5 


1.07 



NOTE — Each test fire is designated by a number in a series in which each term is equal to the sum of the two preceding terms (this series 
is equivalent to geometric progression having a common ratio of about 1 .62). Test fires larger than those given may be constructed following 
the rules of this geometric progression. 

'* One-thirds water and two-thirds heptane. 

-' Measured at rim. 

^* This fire size is for a low-temperature fire test only. 



may move round the fire in order to obtain the best results. 

2 For reasons of safety the operator shall not reach over the edge 
of the tray, and at no time shall the operator onto or into the tray. 

8.5 Class D Test Fire 

8.5.1 General 

The extinguishment of these test fires is based on the use 
of a portable extinguisher having a nominal charge 10 kg 
of media. Extinguishers having a lesser charge shall be 
tested using a proportionally reduced quantity and surface 
area of fuels. Extinguishers with a charge of less than 8 kg 
shall not be allowed. 

WARNING — Some extinguishing media used for Class D fires 
are toxic (for example, barium chloride BaCl^) and/or may react 
with the burning metal to produce materials which are toxic or 
otherwise hazardous (for example, phosphates which react to form 
metal phosphides, which are decomposed by water to produce 
phosphine, PH3, a spontaneously flammable gas). 

Before carrying out these tests, establish procedures to 
protect personnel and to safely dispose of residues from 
test fires. 

Conduct the tests in an essentially draught-free room 
having adequate volume and ventilation to ensure the 
necessar)^ visibility for the period of the test. 

There are no numerical components for Class D ratings. 
The type of combustible metal for which the extinguisher 
is applicable and the area, depth, and oth^r characteristics 
of the fires which may be controlled and extinguish are to 
be summarized on the extinguisher nameplate and 
described in the manufacturer's installation instructions. 



8.5.2 Metal Chip or Turning Fires 

8.5.2.1 Construction 

The fires consist of a bed of the metal fuel 600 mm x 
600 mm square positioned centrally on a steel base-plate 
1 m X 1 m square and 5 mm thick. Use a removable metal 
or wood frame to build the bed. 

For ignition, use a device such as a gas/oxygen torch which 
will ignite the metal within 30 s. 

8.5.2.2 Fuel 

Carry out four series of tests using: 

a) magnesium Al alloy; 

b) magnesium alloy with cutting oil; 

c) reagent-grade magnesium; and 

d) reagent-grade magnesium with cutting oil. 

8.5.2.3 Procedure 

For each test, prepare the fuel bed in the removable metal 
or wood frame. Level the surface of the fuel using a rake 
or straight-edged board. Remove the frame. 

Apply the igniting torch to the centre of the fuel bed, 
removing the torch after 25 s to 30 s. 

Allow the fire to spread until it is estimated that either 
25 percent of the fuel is burning or the fire covers 
50 percent of the fuel bed surface, whichever occurs 
sooner. The extinguisher may then be discharged onto the 
fire at the operator's discretion, continuously or 
intermittently, according to the manufacturer's instructions. 



IS 15683:2006 



Check that fuel is not scattered off the base plate during 
the attack. 

After discharge is completed, allow the fire bed to remain 
undisturbed for the period of time recommended by the 
extinguisher manufacturer, or if no time is recommended, 
for 60 min. Examine the fuel bed and check that the fire is 
completely extinguished and that more than 10 percent 
of the original metal fuel remains. 

8.5.3 Metal Powder or Dust Fires 

8.5.3.1 Construction 

Construct the fires in the same manner as the metal chip 
fires (^e^ 8.5.2.1). 

8.5.3.2 Fuel 

Use magnesium powder containing not less than 99.5 
percent magnesium. All the particles shall pass a 387 ^m 
sieve and no less than 80 percent of the powder shall be 
retained on a 150 )Lim sieve. Carry out two series of tests 
one series using 1 1 .0 ± 0.1 kg of dry metal and one series 
using 9.9 ± 0. 1 kg of the metal plus 1.1 ± 0. 1 kg of the oil 
specified in 8,5.2.2 for each fire. 

8.5.3.3 Procedure 

Carry out the tests using the same procedure as the metal 
chip fires in 8.5.2.3. 

8.5.4 Shallow Liquid Metal Fires 

8.5.4.1 Construction 

Two series of tests are carried out. One series will be carried 
out in a circular steel pan approximately 540 mm in 
diameter and 1 50 ± 1 mm deep, fitted with a tight fitting 
cover, and with suitable means of handling, moving and 
tipping, and with a horizontal thermocouple to be 
positioned in the approximate centre of the pan. This pan 
is also used to melt the metal fuel, using a heat source 
which does not allow any flames to extend beyond the 
base of the pan. In the second series, melted burning fuel 
is poured on a tray approximately 600 mm x 600 mm 
square and having a depth of (155 ± 5) mm. 

8.5.4.2 Fuel 

Use (1.36 ±0.04) kg of sodium for the spill fire, and for 
the pan fire sufficient sodium to give a melted fuel depth 
of(25±l)mm. 

8.5.4.3 Procedure 

8,5.4.3.1 Spill fire 

Position the square tray on a flat level surface. Heat the 
metal in the covered melting pan until the temperature is 
520 i 1 O^C. Carefully remove the cover, allowing the liquid 



metal to ignite as air enters. Stop heating when the 
temperature reaches 550 ± lO'^C and pour the burning 
liquid fuel into the square tray. As soon as the burning 
fuel has spread across the tray the fire can be attacked at 
the operator's discretion using the manufacturer's 
recommended extinguishing techniques. 

After the discharge is completed, allow the fire tray to 
remain undisturbed for the period of time recommended 
by the manufacturer, or if no time is recommended for 
4 ± 0.5 h. Then using a suitable temperature measuring 
device check that the fuel/extinguishing medium mixture 
in the tray is at a temperature no more than 27''C above 
the ambient air temperature and that more than 1 percent 
of the original fuel remains. 

8.5.4.3.2 Panfire 

This test is carried out entirely in the melting pan. 

Melt the fuel and allow it to ignite generally as described 
in 8.5.4.3.1. When the temperature reaches 550 ± lO'^C 
move the pan from the heat source and place it on a level 
floor, where it may be attacked at the operator's discretion, 
using the manufacturer's recommended extinguishing 
techniques. After discharge is completed, follow the 
procedure described in 8.5.4,3.1. 

8.5.5 Simulated Casting Fire 

8.5.5.1 General 

The fire consists of melted metal poured into the steel 
tray described in 8.5.4.1 positioned on a level surface with 
an obstruction, formed from a 50 ± 5 mm length of steel 
I-beam, 100 mm deep and 100 mm wide, positioned 
centrally in the tray, on its side in the attitude of an arch, 
as shown in Fig, 3. 

8.5.5.2 Fuel 

Use 11.3 ± 0.1 kg of the magnesium alloy described 

in 8.5,2.2. 

8.5.5.3 Procedure 

Heat the magnesium alloy in the covered melting pan 
described in 8,5.4.1 until completely melted. Carefully 
remove the cover and continue to heat until the temperature 
reaches 650 ± lO^'C above the melting point if the fuel 
does not ignite spontaneously use the gas torch {see 8.5.2.1) 
to ignite it. Pour the fuel into the tray, but not directly over 
the obstruction. As soon as the burning fuel has spread 
across the tray, the fire can be attacked at the operator's 
discretion using the manufacturer's recommended 
extinguishing techniques. 

After discharge is completed follow the procedure 
described in 8.5.2,3. 



14 



18 15683:2006 




100 



h— 100 —I 





Key 

1-Obstuction 

2- Test pan 

3- Molten fuel 



All dimensions in millimetres. 
Fig, 3 Obstructed Magnesium Spill Fire Configuration 



8.6 Electrical Conductivity of Extinguisher Discharge 
(Type Test) 

8.6.1 Water-Based Extinguishers 

Water-based extinguishers that are marked as suitable for 
use on energized electrical equipment fires shall not pass 
a current of more than 0,5 mA when tested as described 
in 8.6.3. 

8.6.2 Requirements 

Test the extinguisher in accordance with 8.6.3. When the 
extinguisher is in operation and the metallic plate is live, 
the current between the handle or the nozzle and earth 
and between earth and the extinguisher shall be no more 
than 0.5 mA at any time during the complete discharge 
duration of the extinguisher. 



8.6.3 Test for Electrical Conductivity 

Hang a metal plate, of dimensions 1 m ± 25 mm x 1 m ± 
25 mm, vertically from insulating supports. Connect the 
plate to a transformer so that an alternating voltage of 
36 ± 3,6 kV is established between the plate and earth. 
The impedance of the circuit should be such that when a 
voltage equal to 10 percent of the normal primary voltage 
is applied to the primary, and the secondary is 
short-circuited, the current in the secondary is not less 
than 0.1 mA. 

Mount the extinguisher on an insulating support with the 
nozzle fixed 1 m from the centre of the plate, at right angles 
to it and directed towards it. Connect the extinguisher to 
the earth. In the case of an extinguisher with a hose connect 
it to the earth by connection at the nozzle or in the case of 



15 



IS 15683 : 2006 



an extinguisher not fitted with a hose, by connection at 
the handle. 

Measure any current flowing between the extinguisher and 
the earth when the plate is live and the extinguisher 
discharging. 

9 CONSTRUCTION REQUIREMENTS 

9.1 High-Pressure Extinguishers 

Extinguishers with a service pressure greater than 19 bar 
(COj) shall have concave base. For carbon dioxide 
extinguishers, in case of steel body, it shall conform to 
IS 7285 and in case of aluminium body, it shall conform 
to IS 1 5660. Gas cartridge shall conform to IS 4947. The 
CO^ gas cartridge shall be of minimum 60 g. 

9.2 Low-Pressure Extinguishers 

9.2.1 General Requirements 

92AA These requirements are applicable to extinguishers 
having a service pressure (P^) not exceeding 19 bar, 

9.2.1.2 A portable extinguisher with a charge exceeding 
3 kg shall be constructed such that it can be stood vertically 
without extra support. Gas cartridge shall conform to 
IS 4947. 

9.2.1.3 The manufacturer shall ensure that the welds show 
continuous penetration with no deviation in the weld. 
Welds and brazed joints shall be free fi^om defects which 
are prejudicial to the safe use of the cylinder. 

9.2. 1 A Parts attached to the body of the extinguisher shall 
be manufactured and fitted in a way that minimize 
concentrations of stress and corrosion risks. In the case of 
welded and brazed parts, the metal shall be compatible 
with the cylinder material. 

9.2.1.5 The cylinder manufacturer shall obtain the 
certificate for the cast analysis of material supplied. 

9.2.1.6 Where plastic components are threaded into 
metallic parts they shall be designed to minimize the 
possibility of cross-threading. This shall be accomplished 
by the use of coarse threads of less than 5 threads /cm or 
by the use of square-cut threads. 

9.2.1.7 Extinguishers which are free standing shall either 
be fitted with a means to raise the pressure-retaining part 
of the body at least 5 mm above the floor, or the thickness 
of metal in the lowest pressure retaining part or parts of 
the body shall not be less than 1.5 times the minimum 
thickness of the cylindrical part of the body. 

9.2.1.8 Determination of maximum service pressure (P^J 



9.2.1.8.1 Conduct the test on a minimum of three 
extinguishers conditioned at 55 *^C for 18 h, 

9.2.1.8.2 For stored-pressure type extinguishers, determine 
the pressure immediately after taking each extinguisher 
out of the oven. For cartridge-operated type extinguishers, 
remove each extinguisher from the oven and activate the 
cartridge immediately. 

9.2.1.8.3 For each type ofextinguisher the highest pressure 
observed during 9.2,1.8.2 is recorded as the maximum 
service pressure {P^). 

9.2.2 Burst Test 

9.2.2.1 Fill the extinguisher with a suitable liquid and 
increase the pressure at a rate not exceeding (20 ± 2) bar/ 
min until the minimum burst pressure {P^ is achieved. 
Maintain this pressure for 1 min without the cylinder 
rupturing. Increase the pressure until rupture occurs. The 
minimum burst pressure {P^ shall be 2.7 x P^^ but in no 
case less than 55 bar. 

9.2.2.2 The bursting test shall not cause the cylinder to 
fragment. 

9.2.2.3 The break shall not show any sign of brittleness, 
that is the edges of the break shall not be radial but shall 
be slanting in respect of a diametrical plane and shall 
exhibit a reduction in area over their entire thickness. 

9.2.2.4 The break shall not show any characterized defect 
in the metal 

9.2.2.5 The break shall not occur in the weld at a pressure 
less than 5.4 x p^^ or 8 MPa (80 bar), whichever is greater. 

9.2.2.6 During the burst test, no parts shall be ejected 
from the extinguisher. 

9.2.3 Crushing Test (Type Test) 

9.2.3.1 Crush a minimum of three extinguishers 
perpendicularly to their longitudinal axis, and at their 
midpoint using two 25 mm thick mandrels with a radius at 
their apex of 12.5 mm and a width sufficient to extend 
beyond the sides of the extinguisher {see Fig. 4). Crush 
the cylinder over a period between 30 s and 60 s. In the 
case of extinguishers with a longitudinal weld place, the 
weld seam at 90^ to the support lines. For extinguishers 
with central transverse welds, apply the mandrel at 45° to 
the weld seam. 

9.2.3.2 After the crushing test, fill the extinguishers with 
water and increase the pressure to test pressure {P^). The 
extinguishers shall not exhibit any cracks or leaks. 



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18 15683:2006 



25 




R = 1-2;5 mm 



Where 



is the distance after test 
D is the outside diameter of cylinder 



Fig. 4 Crushing Test 



9.2.4 Permanent Volumetric Expansion Test (Type Test) 

It is only for high pressure cylinders. There shall be no 
permanent expansion in excess of 10 percent of the total 
expansion of the cylinder when subjected to the test 
pressure (P^) for 30 s. For cylinders that have been proof- 
pressure tested prior to the deformation test, test pressure 
shall be increased by 1 percent/ 

NOTE — An acceptable test apparatus is the water jacket test 
however other methods are also acceptable. 

9.2.5 Pressure Cycling Test (Type Test) 

A minimum of two cylinders shall be tested. 

An extinguisher cylinder shall sustain, without rupture, 
5 000 cycles from to the test pressure (P) and back to 
at the rate of 6 cycles/min. At the conclusion of testing, 
the cylinder shall be subjected to and comply with the 
burst test. 

9.2.6 Welded Low Carbon Steel Cylinder 

9.2.6.1 The cylinder material shall be capable of being 
welded and shall contain a maximum of 0.25 percent 
carbon, 0.05 percent of sulphur and 0.05 percent of 
phosphorous. 

9.2.6.2 Filler material shall be compatible with the steel 
to give welds with properties equivalent to those specified 
for the base sheet. 

9.2.6.3 The cylinder shall have a measured thickness 



greater than the minimum thickness given by the following 
formula but in no case less than 0.70 mm: 



S^- 



D 
300 



where 

S == minimum thickness, expressed in mm; 

D = outside diameter of the cylinder or, for non- 
cylindrical bodies, the greatest external diagonal 
of the extinguisher body, expressed in mm; and 

k == coefficient equal to: 

0.45 for D < 80; 

0.50 for 80 <D< 100; and 

0.70 for D> 100. 

9.2.7 Stainless Steel Cylinders 

9.2.7.1 Stainless steel domes and bottoms shall be drawn 
from fully annealed stock. 

9.2.7.2 Only austenitic stainless steel having a maximum 
carbon content of 0.03 percent shall be used. 

9.2.7.3 The cylinder shall have a minimum measured 
wall thickness greater than the minimum wall thickness 
given by the following formula but in no case less than 
0.64 mm: 



S = 



D 
600 



+ k 



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IS 15683 : 2006 



where 

S = minimum wall thickness, expressed in mm; 

D = outside diameter of the cylinder or, for non- 
cylindrical bodies, the greatest external diagonal 
of the extinguisher body, expressed in mm; and 

k = 0.3. 

9,2,8 Aluminium Cylinders 

9.2. 8J Aluminium cylinders shall be of a seamless 
construction. 

9,2,8.2 Aluminium cylinders shall have a measured wall 
thickness greater than or equal to the minimum thickness 
given by the following formula but in no case less than 
0.71 mm: 



D 



80 



+ k 



where 

S = minimum thickness, expressed in mm; 

D = outside diameter of the cylinder, or for non- 
cylindrical bodies the greatest external diagonal 
of the extinguisher body, expressed in mm; and 

k = coefficient equal to: 

0.2 for D< 100 mm; 

0.3forD> lOOmm. 

9.3 Carrying Handle 

9.3.1 An extinguisher having a total mass of 1.5 kg or 
more and having a cylinder diameter of 75 mm or more 
shall have a carrying handle. 

NOTE — The valve assembly head itself may be considered a 
handle, provided it meets the requirements of 9.3.2 and 9.3.3. 

9.3.2 A handle shall be not less than 90 mm long for an 
extinguisher of 7.0 kg or more total mass and not less 
than 75 mm long for an extinguisher of less than 7,0 kg 
total mass. 

9.3.3 There shall be not less than 25 mm clearance between 
extinguisher body and the carrying handle when the handle 
is in the carrying position. 

9.4 Mounting 

i.l Each extinguisher intended for wall mounting shall 
nrovided with a means of mounting. 



9.4 



be provided with a means of mounting. 

9.4.2 A wall mounting hook shall require both a horizontal 
and a minimum 6 mm vertical motion to remove the 
extinguisher from the wall 



£'A'C£'/*r/(9A'^ A minimum vertical motion of 3 mm is acceptable 
for an extinguisher having a gross mass of 5.4 kg or less. 

9.4.3 A mounting bracket shall be capable of withstanding 
a static load of five times the flilly charged mass of the 
extinguisher, when tested in accordance with 9.4.4. 

9.4.4 Place an extinguisher charged to its rated capacity 
in the mounting bracket provided with the extinguisher 
after the mounting bracket has been secured to a wood 
board. Secure the board in a vertical position and apply a 
static load of four times the full extinguisher mass (or a 
total load of 45 kg minus the full extinguisher mass, 
minimum) to the top of the extinguisher. Hold the load for 
5 min. 

9.4.5 A mounting bracket equipped with a strap shall not 
permit the extinguisher to drop to the floor when the strap 
clamp is opened. The clamp releasing device shall be of a 
colour contrasting with that of the immediate extinguisher 
background and shall be visible. The method of release 
shall be obvious when viewing the front of the extinguisher. 

9.4.6 A hanger loop shall be located so that the operating 
instructions face outward when the extinguisher is 
supported by the mounting means. 

9.5 Caps, Valves and Closures 

9.5.1 Cylinder caps, valves and closures shall be designed 
to provide release of pressure before complete 
disengagement. 

9.5.2 Threaded connections on cylinder shall have at least 
four fiill threads of engagement and be required to relieve 
pressure with at least two full threads of engagement. Other 
types of valves, caps and closures are permissible if they 
can satisfy the same requirements, particularly with regard 
to recurrent tests and filling. 

9.5.3 The inside diameter of a filling opening for a 
rechargeable type extinguisher shall be no less than 
19 mm. 

9.5.4 An extinguisher collar with external threads shall 
have sufficient height so that the cap or valve does not 
contact the dome or bottom with the gasket removed. 

9.5.5 A cap, valves or closure shall withstand the burst 
test pressure specified for the cylinder for 1 min without 
rupture. For this test, remove or plug pressure relief 
devices. 

9.5.6 The edges and surfaces ofa fire extinguisher and its 
mounting bracket, shall not be sufficiently sharp to 
constitute a risk of injury to persons during intended use 
or while performing maintenance. 



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IS 15683 : 2006 



9.6 Safety Devices 

9.6.1 High pressure cylinders and cartridges shall be 
provided with a safety device in accordance with national 
regulations. 

9.6.2 There are no compulsory safety systems required 
for low-pressure extinguishers. However, if such a system 
is used, it must be appropriately sized and positioned. The 
operating pressure of the device shall not exceed the test 
pressure (P^) nor be less than the maximum service pressure 
(P ). 

9.7 Manufacturing Tests 

9.7.1 Low-Pressure Cylinders 

9.7.1.1 At least one cylinder from each batch of 500 or 
less shall be subjected to the burst tests. If the test results 
are not acceptable, randomly select five additional 
cylinders from the same batch and repeat the tests. If one 
of the cylinders does not pass the test, the batch is rejected 
and made unserviceable. At the option of the manufacturer, 
the burst and cmshing test may be conducted on the same 
cylinder. 

9.7.1.2 Each cylinder shall be subjected to the test pressure 
(P) for 30 s, without leakage, failure or visible 
deformation. 

9.7.2 Leakage Test (Type Test) 

Each stored-pressure and carbon dioxide extinguisher and 
gas cartridge shall be subjected to a leakage test and 
comply with the following requirements: 

a) Stored-pressure extinguishers fitted with a gauge 
as specified in 7.4.1.3, the leakage rate shall not 
exceed a rate of loss of pressurizing content 
equivalent to 5 percent per annum of service 
pressure. 

b) Gas cartridges and stored-pressure extinguishers 
without gauges as specified in 7.4,1.2, the maximum 
loss of contents per annum shall not exceed the 
following: 

1) for extinguishers: 5 percent or 50 g, whichever 
is less, and 

2) for gas cartridges: 5 percent or 7 g, whichever 
is less. 

c) Carbon dioxide extinguishers the maximum loss of 
contents shall not exceed 5 percent per annum. 

NOTE — All stored-pressure extinguisher soap solution test be 
conducted to check leakage as a routine test. 

9.8 Requirements for Plastics Components 
9,8.1 General Requirements 



9.8.1.1 Plastics components of portable tire extinguishers 
shall comply with the following requirements. 

The test and conformity checks shall be carried out on 
components which correspond to the mass-produced 
components in respect of the material used, the form and 
the method of manufacture. 

9.8.1.2 It is recommended that the plastic used, be 
identifiable at all times. 

Any change in the material, the form, or the method of 
manufacture requires a new test. 

9.8.1.3 It is necessary to have access to data supplied by 
the manufacturer relating both to the material itself and 
the manufacturing procedures. 

9.8.1.4 To verify the attachment of plastic parts following 
the air-oven ageing, ultraviolet light exposure and impact- 
resistance tests, attach the plastic part(s) to an extinguisher 
and then subject the assembly to the appropriate pressure 
test. 

9.8.2 Requirements for Normally Pressurized Components 

9 MJIA Burst strength 

9.8.2.1.1 Conduct burst tests at three temperatures as 
described below: 

Subject at least three components to the burst test in 
accordance with 9.2.2 using an appropriate liquid at 
temperatures of 27±5°C, the minimum recommended 
operation temperature marked on the extinguisher 
{see 7.1), and 55 ± 5°C. Increase the pressure at a rate of 
2 ± 0.2 MPa/min. 

9.8.2.1.2 The bursting pressure before and after the ageing 
and ultraviolet light exposure test shall be at least equal to 
the minimum burst pressure (PJ 

9.8.2.2 Air-oven ageing 

9.8.2.2.1 Subject at least three components to accelerated 
ageing in an oven at 100 °C for 180 days. Fit the 
components with adapters to apply normal assembly 
stresses. 

9.8.2.2.2 Following the exposure, condition the 
comppnents for 5 h at 27 ± 5°C and subsequently inspect 
them for cracking. No cracking shall be permitted. 

9.8.2.2.3 Subject the components to the burst test in 
accordance with 9.2.2 at 27 ± 5 °C using a suitable liquid 
at a rate of pressure increase of 2 ± 0.2 MPa/min. The 
bursting pressure (PJ shall be at least equal to that 
specified for the cylinder. 



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1815683:2006 



9.8.3 Ultraviolet Light Exposure 

9.8.3.1 Subject at least six components to an artificial 
weathering test in accordance with 9.8.3,4 for 500 h and 
then condition them for 5 h at 20 ± 5°C. 

9.8.3.2 Following the exposure, inspect the samples for 
cracking. No cracking shall be permitted. 

9.8.3.3 Subject the components to the burst test in 
accordance with 9,2.2 at 20 ± 5 °C using a suitable liquid 
at a rate of pressure increase of 2 ± 0.2 MPa/min. The 
bursting pressure {P^ shall be at least equal to that 
specified for the cylinder. 

9.8.3.4 Use two stationary enclosed carbon-arc lamps to 
obtain the ultraviolet light. The arc of each lamp is to be 
formed between two vertical carbon electrodes, 12.7 mm 
in diameter, located at the centre of a removable vertical 
metal cylinder, 787 mm in diameter and 450 mm in height. 
Enclose each arc in a clear borosilicate-glass globe. Mount 
the samples vertically on the inside of the revolvable 
cylinder, facing the lamps, and revolve the cylinder 
continuously around the stationary lamps at 1 rev/min. 
Provide a system of nozzles so as to spray each sample, in 
turn, with water as the cylinder revolves. During each 
operating cycle (total of 20 min), expose each sample to 
the light and water spray for 3 min and to the light only 
for 17 min. Maintain the air temperature within the 
revolving cylinder of the apparatus during operation at 
63±5X. 

Alternatively, test by using a Xenon arc source, for a period 
of 500 h may be carried out. Use the following conditions: 

a) 65 ± 3°C black panel temperature; 

b) 50 ± 5 percent relative humidity; 

c) spray cycle: 10^ min dry interval, 18 min water 
spray; and 

d) total dose of exposure : 1 GJ/m^ (500 h at 
550 W/m^). 

9.8.4 Impact Resistance 

9.8.4.1 Mount at least four samples subjected to the ageing 
test {see 9.8.2.2) (two with and two without the safety- 
locking device engaged), and pressurize the extinguisher 
cylinder to the maximum service pressure {P^^ with 
nitrogen after being filled 95 percent with a water and 
anti-freeze solution. Test the samples at -27 ± 5'^C or at 
the minimum recommended operation temperature, 
whichever is lower. The test is carried out as described 
in 7.5.1. 

9.8.4.2 No hazardous changes shall occur to the valve 
assembly such as splinters, fractures or cracks. The valve 



shall then be capable of withstanding the test pressure (P ) 
without bursting. 

9.8.5 Normally Non-pressurized Components 

9.8.5.1 Subject plastic extinguisher components which 
withstand pressure upon extinguisher operation to the 
burst, air-oven ageing and impact-resistance tests. The air- 
oven exposure is either lOO^^C for 70 days or %TC for 
1 80 days at the manufacturer's choice. 

9.8.5.2 External plastic components shall comply with 
the ultraviolet light test. 

9.8.6 Test for Exposure to Extinguishing Medium 

9.8.6.1 There shall be no damage to polymeric siphon tubes 
which have been conditioned in accordance with 9.8.6.3, 
when installed in test extinguishers and subjected to the 
mechanical resistance test described in 7.5, 

9.8.6.2 Following conditioning in accordance with 9,8.6.3, 
ring samples cut from polymeric siphon tubes shall not 
exhibit degradation in excess of 40 percent of the original 
tensile or ring crushing strength value. 

9.8.6.3 Place complete siphon tubes in contact with the 
extinguishing (water based only) media with which they 
are to be used. Totally cover or immerse ring samples, 
12.7 mm wide, cut from unaged siphon tubes in the media. 
Ensure the samples do not touch each other or the container 
holding the media and samples. Place the container of 
media, with the samples in place, in a preheated oven at 
90 ± 5 °C for 210 days. After the test exposure, cool the 
samples in air at 27 ± 5 °C for at least 24 h before any 
tests or dimensional measurements are conducted. Subject 
the ring samples to a crush test between two parallel flat 
plates using a testing machine capable of applying a 
compressive load at a uniform rate of 5 mm/min and 
recording the load versus the deflection. If the nature of 
the material is such that meaningful test results cannot be 
obtained, other tests, such as tensile tests, may be 
conducted. 

9.9 Hose Assemblies (Batch Test) 

9.9.1 Extinguishers with a charge greater than 3 kg shall 
be equipped with a hose assembly having a minimum 
length of 400 mm. 

9.9.2 The hose and coupling system shall function 
throughout the operating temperature range, and coupling 
systems shall be designed and fitted in such a way that 
they cannot damage the hose. 

9.9.3 The burst pressure of a hose assembly fitted with a 
shut-off nozzle shall be equal to or greater than appropriate 



20 



IS 15683 : 2006 



value below. The test pressure shall be established by 
increasing the pressure to the minimum allowable burst 
pressure in a time no less than 30 s, maintaining that 
pressure for 30 s during which failure shall not occur and 
then increasing the pressure until failure. 

For all types except CO^ and clean agent extinguishers: 

a) 2.0 tunes the maximum sei-vice pressure {P^), the 
test being carried out at 7 ± 5 °C; and 

b) 1 .5 times the maximum service pressure (P^), the 
test being carried out at 55 ± 2 °C. 

For CO, and clean agent extinguishers: 

a) 1.5 times the maximum service pressure {P^J, the 
test being carried out at 27± 5 °C; and 

b) 1 .25 times the maximum service pressure {P^^J, the 
test being carried out at 55 ± 5 '^C. 

9.9.4 A hose assembly without a shut-off nozzle shall be 
capable of withstanding, without leakage, a hydrostatic 
pressure equal to the extinguisher test pressure, (P) held 
for at least 30 s. 

9.10 Method ofOperation (Batch Test) 

The extinguisher shall be operated by piercing, opening 
and/or breaking a sealing device, thus releasing its 
contents. Extinguishers shall operate without inversion. It 
shall not be necessary for any movement of the actuating 
mechanism to be repeated in order to initiate discharge of 
the extinguisher. The forces or the energy necessary to 
operate the extinguisher shall not exceed the values given 
in Table 10 for temperatures up to 55 °C. 

The energy of 2 J is obtained by allowing the 4 kg mass 
used in the mechanical resistance (impact) test described 
in 7.5 to fall from a height of 50 mm. The impact shall be 
applied in the direction of the operating mode. 

9.11 Safety-Locking Devices (Batch Test) 

9.11.1 The operating mechanism shall be provided with a 
safety device to prevent inadvertent operation. The release 
of the safety device with tamper indicator shall involve an 
operation distinct from that of the operation mechanism 
and shall require a force of no less than 20 N but not 
exceeding 1 00 N. It shall be possible to determine whether 
the apparatus may have been operated. 

9.1L2 The safety-locking device shall be made of a 
corrosion-resistant material. 

9.11.3 The safety-locking pin or other device shall be 
visible from the front of the extinguisher when the 
extinguisher is mounted in its mounting bracket. 



Table 10 Force or Energy Required to 
Operate the Extinguisher 

(Clause 9.10) 



Type of 
Operation 

(1) 



Maximum Force 
Required 

N 
(2) 



Energy 

J 

(3) 



With one finger 100 

With full hand 200'* 

With impact (strike knob) 2 

" For carbon dioxide extinguishers, this inaximum force may be 
increased to 300 M. 



EXCEPTION — The safety-locking pin may be on the reverse 
side of the extinguisher if pictographic operating instructions on 
the front illustrate the intended method of operation, 

9.1L4 If the safety-locking device is attached to the 
extinguisher by a chain or similar device, the chain shall 
be attached so as to not interfere with the discharge stream. 

9.11.5 A tamper indicator such as a seal shall be provided 
to retain the safety-locking device in place and to indicate 
tampering with or use of the extinguisher. 

9.11.6 The tamper indicator shall be constructed so that it 
must be broken to operate the extinguisher. The force 
required to break the tamper indicator shall not exceed 

VON. 

EXCEPTION — If the tamper indicator is broken by the action 
needed to start discharge of the extinguisher, or if an internal load 
is continuously applied to the release mechanism, the force 
required to accomplish discharge or release of the internal load 
may exceed 70 N, but shall not exceed 140 N. 

9.12 Requirements for Pressure Gauges and Indicators 
for Low-Pressure Extinguishers 

9.12.1 General 

9.12.1.1 A rechargeable extinguisher of the stored-pressure 
type (except carbon dioxide) employing a single chamber 
for both the extinguishing medium and the expellant gas 
shall be equipped with a pressure gauge to show the amount 
of pressure in the chamber regardless if the valve is opened 
or closed. 

9.12.1.2 The operable pressure range of the gauge shall 
reflect the operating temperature-pressure relationship of 
the extinguisher (see 7.1). 

9.12.1.3 The pressure gauge face shall indicate the 
appropriate units for which the gauge is calibrated, such 
as bar, or kPa, or any combination of pressure units. 

9.12.1.4 The maximum indicated gauge pressure shall be 



21 



IS 15683 : 2006 



between 150 percent and 250 percent of the indicated 
service pressure (P) at 20 ""C, but not less than 1 20 percent 
of the maximum service pressure (P^), The gauge dial 
shall indicate, in green, the operable pressure range of the 
extinguisher. The zero, service, and maximum indicated 
gauge pressures shall be shown in numerals and with 
marks. The background of the gauge face above a 
horizontal line through the lowest required markings shall 
be red. The arc of the dial from the zero pressure point to 
the lower end of the operable range shall read 'Recharge'. 
The arc of the dial from the higher end of the operable 
range to the maximum indicated pressure shall read 
'Overcharged'. All numerals, letters, and characters in the 
recharge, operable, and overcharge portions of the dial 
shall be white. Pointers shall be yellow, and the tip of the 
pointer shall end in the arc of the pressure indicating dots, 
and shall have a maximum tip radius of 0.25 mm. 

The length of the pointer from the point of rotation of the 
pointer to the tip, measured at the zero pressure point, 
shall be at least 9 mm for extinguishers having a charge 
greater than 2 kg or at least 6 mm for extinguishers having 
a charge of 2 kg or less. The length of the arc from zero 
pressure to the indicated service pressure shall be at least 
12 mm for extinguishers having a charge greater than 
2 kg or at least 9 mm for extinguishers filled with clean 
agents or having a charge of 2 kg or less. 

9,12.L5 The mark used to indicate the service pressure 
at 21°C should be no less than 0.6 mm and no more than 
1 .0 mm wide. 

9.12.1.6 The pressure gauge face shall be marked to 
indicate the appropriate extinguishing medium with which 
it can be used. 

9.12.1.7 The pressure gauge shall be marked with the 
gauge manufacturer's identifying mark. The pressure 
gauge shall also be marked according to the following, if 
applicable, using a line extending as wide as, and of the 
same stroke thickness as, the manufacturer's identifying 
mark. 

9.12.2 Calibration Test — Gauges and Indicators 

9.12.2.1 An indicator shall be accurate to within 4 percent 
of the service pressure (P) at the lower limit of the operable 
range. 

9.12.2.2 The error of a pressure gauge at the indicated 
service pressure (P^) shall not exceed ±4 percent of 
service pressure. 

The error at the upper and lower limits of the operable 
range shall not exceed the following percentages of service 
pressure: 



a) ±4 percent for powder and water-based 
extinguisher gauges; and 

b) ± 8 percent for clean-agent extinguisher gauges. 

At the zero pressure mark the error shall not exceed 
12 percent, nor fall below percent of the service 
pressure (P^). 

At the maximum indicated pressure the error shall not 
exceed ± 1 5 percent of the service pressure (P ). 

9.12.2.3 The pressure gauge or indicator is to be 
installed on a deadweight gauge tester or a piping apparatus 
with a master gauge having an accuracy of no less than 
0.25 percent. The pressurizing medium may be oil, water 
nitrogen, or air, but all tests on a given type of gauge are 
to be conducted using the same medium. The pressure is 
to be applied to the gauge under test in uniform increments 
until the upper limit of the gauge is reached. The pressure 
then is to be reduced in the same increments until the zero 
point is reached. The pressure applied, the gauge or 
indicator reading, and net error are to be recorded for each 
increment in both the increasing and decreasing pressure 
conditions. 

9.12.3 Burst Strength Test — Gauges and Indicators 

9.12.3.1 A pressure gauge or an indicator shall withstand, 
for 1 min, a pressure of six times the indicated service 
pressure without rupture. In addition, if the Bourdon tube 
or pressure-retaining assembly bursts at a pressure less 
than eight times the indicated service pressure, no parts of 
the device shall be discarded. 

9.12.3.2 Attach the sample gauge or indicator to a 
hydraulic pressure pump after all air has been excluded 
from the test system. Place the sample in a test cage and 
apply pressure at a rate of approximately 2.0 MPa/min 
until the required test pressure is reached. Hold the pressure 
is to be held at this point for 1 min, then increase the 
pressure until rupture occurs or eight times the indicated 
service pressure is reached, whichever occurs first. 

9.12.4 Overpressure Test — Gauges 

9.12.4.1 The difference in readings of indicated service 
pressure, before and after a pressure gauge has been 
subjected for 3 h to a pressure of 110 percent of the 
indicated gauge capacity, shall not exceed 4 percent of 
the indicated service pressure. 

9.12.4.2 Subject sample pressure gauges to the required 
test' pressure for 3 h. Then release the pressure and allow 
the gauges to stand at zero pressure for 1 h. Subject the 
gauges to the calibration test described in 9.12.2. 



22 



9. 1 2.5 IVater Resistance Test — Gauges and Indicators 
A gauge or indicator for use on an extinguisher shall remain 
watertight after being immersed at a depth of 0.3 m in 
water for 2 h, and after being subjected to the salt-spray 
corrosion test (see 1.6 A). 

9.12.6 Leakage Test — Gauges and Indicators 

9.12.6.1 A pressure gauge or indicator shall not leak at a 
rate in excess of 1 x i q-^ cm Vs when the gauge or indicator 
(including a pin-type indicator) is exposed to a pressure 
equivalent to the intended service pressure of the 
extinguisher at 20 ^C. 

9.12.6.2 A leak detection apparatus and leak standard 
are to be used to verify compliance with the requirements 
specified in 9.12.6.1. The leak detection apparatus is to 
be capable of signaling, and the leak standard capable of 
generating, a leakage rate of 1 x iq-^ cm Vs. 

9.12.6.3 Apply a pressure equivalent to the intended 
working pressure of the extinguisher at 27 ''C to each of 
twelve sample gauges or indicators. Subject each sample 
gauge or indicator, other than a pin-type indicator, to a 
leak test by checking all pressurized components for 
leakage in order to verify compliance with the requirements 
given in 9.12.6.1 . Test each pin-type indicator for leakage 
by checking the opening sealed by the indicator for 
leakage. None of the samples shall exhibit leakage at a 
rate in excess of 1 x 1 0'^ cm Vs. 

9.12.7 Plastics Components — Gauges and Indicators 

Plastic components of gauges and indicators shall meet 
the requirements given in 9.8. 

NOTE — Alternatively, for gauges, manufacturer's certificate or 
calibration certificate from any recognized agency shall be made 
available. 

9.13 Dip-Tubes and Filters — Water-Based 
Extinguishers 

9.13.1 The dip-tube and filter of water-based extinguishers 
shall be constructed of materials resistant to the 
extinguishing medium (see 9.8.6). 

9.13.2 The extinguishing medium from water-based 
extinguishers shall be discharged through a filter. The filter 
shall be placed upstream of the smallest section of the 
discharge passage. Each orifice of the filter shall have an 
area less than that of the smallest cross-section of the 
discharge passage. The total area of the combined filter 
orifices shall be at least equal to five times the smallest 
section of the discharge passage. 

9.14 Special Requirements for CO^ Extinguishers 

(Type Test) 

The extinguisher horn shall be constructed to withstand 



18 15683:2006 

crushing when 25 kg is applied to its extremity for 5 min 
immediately after having completely discharged the 
extinguisher through the horn. 

Subject the horn to the following test: 

a) Condition the horn at 55 °C for 1 8 h; 

b) Attach the horn to a fully charged extinguisher; 

c) Discharge the extinguisher with the valve fully 
open; 

d) Subject the horn to a static load of 25 kg using a 
circular contact surface of 50 mm diameter for 
5 min applied at the end of the horn; and 

e) Check that the horn does not show any evidence of 
cracking or breakage. 

10 MARKING AND COLOUR 

10.1 Colour 

The recommended colour for extinguisher bodies is red 
conforming to shade No. 536 or 538 of IS 5. The paint 
shall conform to IS 2932. 

10.2 Marking 

NOTE — An example of the layout for marking is given in Fig. 5. 
10.2.1 General 

10.2.1.1 The operating, recharging, and inspection and 
maintenance instructions shall be in the form of an etched 
or embossed metal nameplate or band, or an acceptable 
pressure-sensitive nameplate attached to the side of the 
extinguisher body, or in the form of silk-screening of paint 
directly on the extinguisher body. The marking shall 
identify the extinguisher as to type of media and shall 
include the manufacturer's name and model number and 
the rating and classification of the fire extinguisher. 

10.2.1.2 The marking shall include a sequential serial 
number. 

10.2. 1 .3 The year of manufacture, or the last two digits of 
the calendar year, and the factory test pressure shall be 
permanently marked into the extinguisher body or non- 
transferable nameplate. Extinguishers manufactured in the 
last three months of a calendar year may be marked with 
the following year as the date of manufacture, and 
extinguishers manufactured in the first three months of a 
calendar year may be marked with the previous year as 
the date of manufacture. 

10.2. 1 .4 The marking shall include a reference to the range 
of temperatures at which the extinguisher is usable, such 
as 'Acceptable to use at temperature from . . . to . . . ' or the 
equivalent. 



23 



IS 15683 : 2006 




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IS 15683 : 2006 



10.2.1.5 The following applicable statement or the 
equivalent shall be included in the marking: 

a) For rechargeable extinguishers: ^Recharge 
immediately after any use'; and 

b) For disposable extinguishers: 'Discard immediately 
after any use'. 

10.2.1.6 The gas cartridge shall be permanently marked 
with: 

a) Empty mass in g, 

b) Nominal full mass in g, 

c) Year of manufacture, and 

d) Name or code of the manufacturer. 

The above information may be placed on the cartridge in 
the form of a decalcomania transfer if the cartridge is 
mounted on the outside of the extinguisher media chamber. 
If the cartridge is mounted inside the media chamber, this 
information shall be stenciled or stamped on the cartridge. 

10.2.1.7 The marking on each extinguisher shall include 
its exact gross mass or minimum and maximum gross mass, 
which may be expressed by a tolerance. The gross mass 
shall include the mass of the charged extinguisher and 
discharge assembly. 

10.2.1.8 BIS certification marking 

The extinguisher may also be marked with the Standard 
Mark. 

The use of the Standard Mark is governed by the 
provisions of the Bureau of Indian Standards Act, 1986 
and the Rules and Regulations made thereunder. The 
details of conditions under which a licence for the use of 
the Standard Mark may be granted to manufacturers or 
producers may be obtained from the Bureau of Indian 
Standards. 

10.2.2 Operating Instructions 

10.2.2.1 For the purpose of applying the requirements of 
this section, the 'operating instructions' are defined as those 
necessary to accomplish intended discharge of the, 
extinguishing media including any warnings. An example 
of the layout marking is given in Fig. 6. 

10.2.2.2 Clean-agent fire extinguishers shall contain the 
following warning or equivalent as part of the operating 
instructions: 

WARNING ' — The concentrated agent when applied to the fire 
can produce toxic by-products. Avoid inhalation of these materials 
by evacuating and ventilating the area. Do not use in confined 
spaces of less than XXX cubic metres per extinguisher. 

NOTE — XXX is the volume in cubic metres corresponding to 
the agent's LOAEL times the nominal charge of the extinguisher. 



10.2.2.3 The operating instructions shall face outward 
and cover no more than a 120^ arc on the extinguisher 
body. The marking required in 10,2.2.4 and 10.2.3 shall 
together occupy a minimum surface area of 75.0 cm^ for 
an extinguisher having a diameter greater than 80.0 mm 
and 50.0 cm^ for and extinguisher having a diameter of 
80.0 mm or less. 

10.2.2.4 The operating instructions shall be arranged as 
follows: 

a) Word INSTRUCTIONS 'shall be at the top of the 
nameplate. The minimum letter height shall be 
6.0 mm for an extinguisher having a diameter 
greater than 80.0 mm and 5.0 mm for an 
extinguisher having a diameter of 80.0 mm or less. 
As an option, the words FIRE EXTINGUISHER 
or EXTINGUISHER may be added to the word 
INSTRUCTIONS; 

b) Operating instructions shall be in the form of 
numerically sequenced pictographs. A single 
pictograph may include two instructions; 

c) Sequence of pictographs shall illustrate, with 
pictures, the recommended actions necessary for 
intended operation of the extinguisher. Words may 
be added. The sequence shall be as follows: 

1) making ready the extinguisher by disengaging 
the safety-locking device, 

2) aiming the extinguisher at the base of the fire, 
including the recommended distance from the 
fire at which to begin discharge, and indicating 
the intended operating attitude of the 
exfinguisher, 

3) taking whatever action necessary to initiate 
operation of the extinguisher, and 

4) describing the intended method of applying the 
extinguishing media on the fire. 

10.2.2.5 The extinguisher shall be marked with letters 'A', 
*B' and 'C indicating their suitability for respective class 
of fires as laid down in IS 2190 and numerical indicating 
size of fire such 2 A and B etc. 

10.2.3 Use Code Symbols 

10.2.3.1 Use code symbols {see Fig. 6) shall be posifioned 
directly below the operating instructions. A written 
description for each use code symbol may be included as 
part of the code in letters having a minimum height of 
10 mm. 

10.2.3.2 Use code symbols shall be placed on the 
extinguisher for those types of fires for which the 
extinguisher is classified. For those classes of fires for 
which the extinguishers is not intended for use because of 



25 



IS 15683 : 2006 







Key 

1 . Class A : Ordinary solid material fires 

2. Class B : Flammable liquid fires 

3. Class C ; Gas and vapour fires 

4. Class D : Combustible metal fires 

Fig. 6 Use Code Symbols 



potential injury to the operator, the use code symbols with 
a red slash shall also be placed on the extinguisher. The 
red slash shall be from the top left comer of the symbol to 
the bottom right comer. 

10.2.4 Recharging Instructions 

The recharging instructions on the marking of a 
rechargeable extinguisher shall state the intended mass 
and agent that shall be used in recharging, the intended 
expellant gas pressure or the use of a correct and a fully 
charged gas cartridge. Reference shall be made to use only 
the manufacturer's replacement parts in recharging the 
extinguisher. However, in lieu of detailed recharge 
instructions, these instructions may simply instruct the user 
to return the extinguisher to the dealer or manufacturer 



for recharging, using the following words or the equivalent: 
"Return to an authorized recharger for recharging in 
accordance with Service Manual No...". 

10,3 Inspection Instructions 

The inspection instructions shall state that the extinguisher 
is to be checked to ensure that: 

a) The seals and tamper indicators are not broken or 
missing; 

b) It is full (by weighing or lifting); 

c) It is not obviously damaged, corroded, leaking or 
has a clogged nozzle; and 

d) Its pressure gauge reading or indicator is in the 
operable range or position. 



26 



IS 15683:2006 



11 MANUALS 

11.1 User Manual and Service Manual 

A user manual shall be provided with each extinguisher. 
This manual shall contain the necessary instructions, 
warnings, and cautions for the intended installation, 
operation and inspection of the extinguisher The manual 
shall also reference the manufacturer's service manual for 
maintenance and recharging of the extinguisher. 

The manufacturer shall prepare a service manual for each 
model fire extinguisher. It shall be made available upon 
request and shall: 



a) Contain necessary instruction, warnings, and 
cautions, a description of servicing equipment, and 
a description of recommended operations for 
intended servicing, 

b) Provide a list of part numbers of all replaceable 
parts; and 

c) Indicate that the pressure gauge attached to the 
extinguisher shall not be used to determine when 
the intended service pressure has been reached, and 
a pressure regulator shall be used if the pressure 
service is a tank of high pressure gas. 



ANNEX A 
(Clause 2) 

LIST OF REFERRED INDIAN STANDARDS 



IS No. 



5 : 1994 



1708 (Part I): 1986 



2190: 1992 



2932:2003 



4308 : 2003 



4861 : 1984 



4947 : 1985 



4989 : 1985 



Tide 

Colours for ready mixed paints and 
enamels (fourth revision) 

Method of testing of small clear 
specimens of timber: Part I 
Determination of moisture content 
(second revision) 

Selection, installation and 
maintenance of first-aid fire 
extinguisher — Code of practice 
(second revision) 

Enamel, synthetic, exterior; 
a) undercoating, b) finishing — 
Specification (third revision) 

Dry chemical powder for fighting 
B and C class fires — Specification 
(second revision) 

Specification for dry powder for 
fighting fires in burning metals 
(first revision) 

Specification for gas cartridges for 
use in fire extinguishers (second 
revision) 

Specification for foam concentrate 
(compound) for producing 



IS No. 



6910: 1985 



7285: 1988 

7673 : 2004 
14609: 1999 
15222:2002 

15493:2004 
15660:2006 



Title 

mechanical foam for the fire 
fighting 

Method of testing corrosion 
resistance of electroplated and 
anodized aluminium coatings by 
acetic acid salt spray (AAS) test 
(first revision) 

Specification for seamless steel 
cylinder for permanent and high 
pressure liquefiable gases (second 
revision) 

Fire fighting equipment — 
Glossary of terms (first revision) 

Dry chemical powder for fighting 
A, B, C Class fires — Specification 

Carbon dioxide as fire 
extinguishing media for fire 
protection — Specification 

Gaseous fire extinguishing systems 
— General requirements 

Refillable transportable seamless 
aluminium alloy gas cylinder — 
Specification 



27